A　pilot-scale　modified　step　feed　process　was　proposed　to　enhance　organics　and　nutrient　(N　and　P)　removal　performance　from　municipal　wastewater.　It　combined　University　of　Cape　Town　(UCT)　and　step　feed　process.　Effects　of　inflow　distribution　ratios　and　nutrients　ratios　were　investigated.　The　highest　removal　efficiencies　of　89%　for　chemical　oxygen　demanding　(COD),　88%　for　total　nitrogen　(TN)　and　93%　for　phosphorus　were　obtained,　respectively,　at　the　inflow　distribution　ratio　of　40:30:30%.　The　phosphorus　removal　exhibited　an　upward　trend　with　the　increasing　of　influent　COD/P　and　TN/P,　and　the　nitrogen　removal　had　a　positive　correlation　with　influent　COD/TN.　In　addition,　aerobic　simultaneous　nitrification　and　denitrification　and　anoxic　denitrifying　phosphorus　uptake　made　a　distinct　contribution　to　enhance　nutrient　removal.　The　proposed　system　was　demonstrated　to　be　an　attractive　enhanced　biological　nutrient　removal　process　for　wastewater　treatment　plants　due　to　relatively　high　nutrient　removal,　robust　sludge　settleability　and　energy　savings.　(C)　2010　Elsevier　Ltd.　All　rights　reserved.